公开(公告)号：DE3782830D1

公开(公告)日：1993-01-14

申请号：DE3782830

申请日：1987-01-08

Applicant: IBM

Inventor： RAHIM OMAR MAHMOUD ,  KWONG EDWARD YUMAN ,  IIDA YOSHIO ,  ELSNER MATTHEW

IPC: G09G5/36 ,  G09G5/00 ,  G09G5/02 ,  G09G5/06 ,  G09G5/393 ,  G09G5/395 ,  G09G1/28 ,  G09G1/16 ,  G06F3/153

Abstract: A colour graphics display having a read/write control system for a buffer memory therein provides Line-on-Line and Underpaint mode operation, if selected and enabled, by reading the contents of a frame buffer storage location for which new pixel data is being provided, comparing those contents with data representing a display background characteristic or colour, and if the result of the comparison is positive, storing the new pixel data to the frame buffer storage location. If the result of the comparison is negative, a selected data value different from the new pixel data is stored to the frame buffer storage location.

公开(公告)号：DE69323048D1

公开(公告)日：1999-02-25

申请号：DE69323048

申请日：1993-10-25

Applicant: IBM

Inventor： DINICOLA PAUL DAVID ,  KANTZ JOSEPH C ,  RAHIM OMAR MAHMOUD ,  RICE DAVID ANDREW ,  RUDDICK EDWARD MARK

IPC: G06F15/16 ,  G06F15/163 ,  G06T1/20 ,  G06T11/00 ,  G06T15/00 ,  G06T1/00 ,  G06F9/46

Abstract: In a graphics subsystem, a highly interactive two-dimensional (2D) data stream and a computationally intensive three-dimensional (3D) data stream are processed concurrently in such a manner that processing of the 2D data stream is not held up by processing of the 3D data stream. A 3D geometry subsystem having a parallel pipeline architecture is used to process the 3D data stream, while a 2D subsystem concurrently processed the 2D data stream in parallel with the 3D subsystem. A reordering device couples the processed 2D and 3D data streams to a common raster subsystem. The reordering device, which contains an internal buffer, reorders any order-dependent elements of the 3D data stream appearing at the output of the 3D geometry subsystem in an order different from the order in which they were supplied to the input end. The reordering device prioritizes the 2D data stream relative to the 3D data stream so that elements of the 2D data stream arriving from the 2D subsystem are passed to the raster subsystem almost immediately, without having to wait for elements of the 3D data stream.

公开(公告)号：DE3782830T2

公开(公告)日：1993-06-09

申请号：DE3782830

申请日：1987-01-08

Applicant: IBM

Inventor： RAHIM OMAR MAHMOUD ,  KWONG EDWARD YUMAN ,  IIDA YOSHIO ,  ELSNER MATTHEW

IPC: G09G5/36 ,  G09G5/00 ,  G09G5/02 ,  G09G5/06 ,  G09G5/393 ,  G09G5/395 ,  G09G1/28 ,  G09G1/16 ,  G06F3/153

Abstract: A colour graphics display having a read/write control system for a buffer memory therein provides Line-on-Line and Underpaint mode operation, if selected and enabled, by reading the contents of a frame buffer storage location for which new pixel data is being provided, comparing those contents with data representing a display background characteristic or colour, and if the result of the comparison is positive, storing the new pixel data to the frame buffer storage location. If the result of the comparison is negative, a selected data value different from the new pixel data is stored to the frame buffer storage location.